@article {83720,
title = {Sensitivity of grassland plant community composition to spatial vs. temporal variation in precipitation},
volume = {94},
year = {2013},
keywords = {SEV, species turnover},
doi = {10.1890/12-1006.1},
url = {http://dx.doi.org/10.1890/12-1006.1},
author = {Cleland, Elsa E and Turnbull, Laura and Suding, Katharine N. and Collins, Scott L. and Dickson, Timothy L. and Farrer, Emily C. and Gross, Katherine L. and Gherardi, Laureano A. and Hallett, Lauren M. and Hobbs, Richard J. and Hsu, Joanna S.}
}
@article {80669,
title = {Incorporating clonal growth form clarifies the role of plant height in response to nitrogen addition},
volume = {169},
year = {2012},
pages = {1053-1062},
abstract = {Nutrient addition to grasslands consistentlycauses species richness declines and productivity increases.Competition, particularly for light, is often assumed to producethis result. Using a long-term dataset from North Americanherbaceous plant communities, we tested whether heightand clonal growth form together predict responses to fertilizationbecause neither trait alone predicted species loss in aprevious analysis. Species with a tall-runner growth formcommonly increased in relative abundance in response toadded nitrogen, while short species and those with a tallclumpedclonal growth form often decreased. The ability toincrease in size via vegetative spread across space, whilesimultaneously occupying the canopy, conferred competitiveadvantage, although typically only the abundance of a singlespecies within each height-clonal growth form significantlyresponded to fertilization in each experiment. Classifyingspecies on the basis of two traits (height and clonal growthform) increases our ability to predict species responses tofertilization compared to either trait alone in predominantlyherbaceous plant communities.},
keywords = {ARC, clonal growth, competition, GCE, grassland, KNZ, nitrogen addition, productivity},
doi = {10.1007/s00442-012-2264-5},
author = {Gough, Laura and Gross, Katherine L. and Cleland, Elsa E and Clark, Christopher M. and Collins, Scott L. and Fargione, Joseph E. and Pennings, Steven C. and Suding, Katherine N.}
}
@article {80792,
title = {Abundance of introduced species at home predicts abundance away in herbaceous species},
volume = {14},
year = {2011},
pages = {274-281},
keywords = {SEV},
author = {Firn, Jennifer and Knops, Johannes M.H. and Prober, Suzanne M. and Pyke, David A. and Farrell, Kelly A. and Bakker, John D. and O{\textquoteright}Halloran, Lydia R. and Adler, Peter B. and Collins, Scott L. and D{\textquoteright}Antonio, Carla and Crawley, Michael J. and Moore, Joslin L. and Wolkovich, Elizabeth M. and La Pierre, Kimberly J. and Melbourne, Brett A. and Hautier, Yann and Morgan, John W. and Leakey, Andrew D.B. and Kay, Adam and McCulley, Rebecca and Davies, Kendi F. and Stevens, Carly J. and MacDougall, Andrew S. and Chu, Cheng-Jin and Holl, Karen D. and Klein, Julia A and Fay, Phillip A. and Hagenah, Nicole and Kirkman, Kevin P. and Buckley, Yvonne M. and Borer, Elizabeth T. and Seabloom, Eric W. and HilleRisLambers, Janneke and Harpole, W. Stanley and Cleland, Elsa E and Brown, Cynthia S.}
}
@article {80791,
title = {Abundance of introduced species at home predicts abundance away in herbaceous communities},
volume = {14},
year = {2011},
pages = {274-281},
keywords = {AND},
url = {http://andrewsforest.oregonstate.edu/pubs/pdf/pub4683.pdf},
author = {Firn, Jennifer and Knops, Johannes M.H. and Prober, Suzanne M. and Pyke, David A. and Farrell, Kelly A. and Bakker, John D. and O{\textquoteright}Halloran, Lydia R. and Adler, Peter B. and Collins, Scott L. and D{\textquoteright}Antonio, Carla M. and Crawley, Michael J. and Moore, Joslin L. and Wolkovich, Elizabeth M. and La Pierre, Kimberly J. and Melbourne, Brett A. and Hautier, Yann and Morgan, John W. and Leakey, Andrew D.B. and Kay, Adam and McCulley, Rebecca and Davies, Kendi F. and Stevens, Carly J. and MacDougall, Andrew S. and Chu, Cheng-Jin and Borer, Elizabeth T. and Seabloom, Eric W. and HilleRisLambers, Janneke and Harpole, Stanley and Cleland, Elsa E and Brown, Cynthia S.}
}
@article {81305,
title = {Rank clocks and plant community dynamics},
volume = {89},
year = {2008},
pages = {3534-3541},
publisher = {na},
keywords = {SEV},
author = {Collins, Scott L. and Clark, Christopher M. and Suding, Katharine N. and Cleland, Elsa E and Batty, Michael and Pennings, Steven C. and Gross, Katherine L. and Grace, James B. and Gough, Laura and Fargione, Joseph E.}
}
@article {67190,
title = {Rank clocks and plant community dynamics},
journal = {Ecology},
volume = {89},
year = {2008},
pages = {3534-3541},
abstract = {Summarizing complex temporal dynamics in communities is difficult to achieve in a way that yields an intuitive picture of change. Rank clocks and rank abundance statistics provide a graphical and analytical framework for displaying and quantifying community dynamics. We used rank clocks, in which the rank order abundance for each species is plotted over time in temporal clockwise direction, to display temporal changes in species abundances and richness. We used mean rank shift and proportional species persistence to quantify changes in community structure in long-term data sets from fertilized and control plots in a late successional old field, frequently and infrequently burned tallgrass prairie, and Chihuahuan desert grassland and shrubland communities. Rank clocks showed that relatively constant species richness masks considerable temporal dynamics in relative species abundances. In the old field, fertilized plots initially experienced high mean rank shifts that stabilized rapidly below that of unfertilized plots. Rank shifts were higher in infrequently burned vs. annually burned tallgrass prairie and in desert grassland compared to shrubland vegetation. Proportional persistence showed that arid grasslands were more dynamic than mesic grasslands. We conclude that rank clocks and rank abundance statistics provide important insights into community dynamics that are often hidden by traditional univariate approaches.},
keywords = {CDR, community, dynamics, ecology, GCE, plant, rank clocks, SEV},
doi = {10.1890/07-1646.1},
url = {http://www.esajournals.org/doi/abs/10.1890/07-1646.1},
author = {Collins, S. L. and Clark, Christopher M. and Suding, K.N. and Cleland, Elsa E and Batty, M. and Pennings, Steven C. and Gross, Katherine L. and Grace, James B. and Gough, Laura. and Fargione, J. E.}
}
@article {81327,
title = {Species responses to nitrogen fertilization in herbaceous plant communities, and associated species traits},
volume = {89},
year = {2008},
pages = {1175},
publisher = {na},
keywords = {SEV},
author = {Cleland, Elsa E and Burke, Ingrid C. and Lauenroth, William K. and Robertson, G. Philip and Simpson, Juliet C. and Tilman, David and Suding, Katharine N. and Clark, Christopher M. and Collins, Scott L. and Fargione, Joseph E. and Gough, Laura and Gross, Katherine L. and Milchunas, Daniel G. and Pennings, Steven C. and Bowman, William D.}
}
@article {67294,
title = {Species responses to nitrogen fertilization in herbaceous plant communities, and associated species traits},
journal = {Ecology},
volume = {89},
year = {2008},
pages = {1175},
abstract = {This synthetic dataset contains plant species relative abundance measures from 35 nitrogen (N) fertilization experiments conducted at 10 sites across North America. The dataset encompasses the fertilization responses of 691 species from 1,159 experimental plots. The methodology varied among experiments, in particular with regards to the type and amount of N added, plot size, species composition measure (biomass harvest, pin count or percent cover), additional experimental manipulations, and experimental duration. At each site, each species has been classified according to a number of easily identified categorical functional traits, including life history, life form, the number of cotyledons, height relative to the canopy, potential for clonal growth, and nativity to the United States. Additional data are available for many sites, indicated by references to publications and websites. Analyses of these data have shown that N enrichment significantly alters community composition in ways that are predictable on the basis of plant functional traits as well as environmental context. This dataset could be used to answer a variety of questions about how plant community composition and structure respond to environmental changes.},
keywords = {ARC, community, ecology, fertization, GCE, plant, SEV, SGS, species traits},
author = {Cleland, Elsa E and Burke, Indie C. and Lauenroth, G. P. and Robertson, J. C. and Simpson, Juliet C. and Tilman, D. and Suding, K.N. and Clark, Christopher M. and Collins, S. L. and Fargione, J. E. and Gough, Laura. and Gross, Katherine L. and Milchunas, DG. and Pennings, Steven C. and Bowman, W. D.}
}
@article {67609,
title = {Environmental and plant community determinants of species loss following nitrogen enrichment},
journal = {Ecology Letters},
volume = {10},
year = {2007},
pages = {596-607},
abstract = {Global energy use and food production have increased nitrogen inputs to ecosystems worldwide, impacting plant community diversity, composition, and function. Previous studies show considerable variation across terrestrial herbaceous ecosystems in the magnitude of species loss following nitrogen (N) enrichment. What controls this variation remains unknown. We present results from 23 N-addition experiments across North America, representing a range of climatic, soil and plant community properties, to determine conditions that lead to greater diversity decline. Species loss in these communities ranged from 0 to 65\% of control richness. Using hierarchical structural equation modelling, we found greater species loss in communities with a lower soil cation exchange capacity, colder regional temperature, and larger production increase following N addition, independent of initial species richness, plant productivity, and the relative abundance of most plant functional groups. Our results indicate sensitivity to N addition is co-determined by environmental conditions and production responsiveness, which overwhelm the effects of initial community structure and composition.},
keywords = {CDR, community, ecology, enrichment, fertilization, GCE, nitrogen, nutrients, plant, species loss},
doi = {10.1111/j.1461-0248.2007.01053.},
author = {Clark, Christopher M. and Cleland, Elsa E and Collins, S. L. and Fargione, J. E. and Gough, Laura. and Gross, Katherine L. and Pennings, Steven C. and Suding, K.N. and Grace, James B.}
}
@article {81376,
title = {Environmental and plant community determinants of species loss following nitrogen enrichment},
volume = {10},
year = {2007},
pages = {596-607},
publisher = {na},
keywords = {SEV},
author = {Clark, Christopher M. and Cleland, Elsa E and Collins, Scott L. and Fargione, Joseph E. and Gough, Laura and Gross, Katherine L. and Pennings, Steven C. and Suding, Katharine N. and Grace, James B.}
}
@article {81507,
title = {Do individual plant species show predictable responses to nitrogen addition across multiple experiments?},
volume = {110},
year = {2005},
pages = {547-555},
publisher = {na},
keywords = {ARC, KNZ, SEV},
author = {Pennings, Steven C. and Clark, Christopher M. and Cleland, Elsa E and Collins, Scott L. and Gough, Laura and Gross, Katherine L. and Milchunas, Daniel G. and Suding, Katharine N.}
}
@article {81509,
title = {Do individual plant species show predictable responses to nitrogen addition across multiple experiments?},
volume = {110},
year = {2005},
pages = {547-555},
abstract = {A number of experiments have addressed how increases in nitrogen availability increase the productivity and decrease the diversity of plant communities. We lack, however, a rigorous mechanistic understanding of how changes in abundance of particular species combine to produce changes in community productivity and diversity. Single experiments cannot provide insight into this issue because each species occurs only once per experiment, and each experiment is conducted in only one location; thus, it is impossible from single experiments to determine whether responses of particular species are consistent across environments or dependent on the particular environmental context in which the experiment was conducted. To address this issue, we assembled a dataset of 20 herbaceous species that were each represented in at least 6 different fertilization experiments and tested whether responses were general across experiments. Of the 20 species, one consistently increased in relative abundance and five consistently decreased across replicate experiments. A partially-overlapping group of 8 species displayed responses to nitrogen that varied predictably among experiments as a function of geographic location, neighboring species, or a handful of other community characteristics (ANPP, precipitation, species richness, relative abundance of focal species in control plots, and community composition). Thus, despite modest replication and a limited number of predictor variables, we were able to identify consistent patterns in response of 10 out of 20 species across multiple experiments. We conclude that the responses of individual species to nitrogen addition are often predictable, but that in most cases these responses are functions of the abiotic or biotic environment. Thus, a rigorous understanding of how plant species respond to nitrogen addition will have to consider not only the traits of individual plant species, but also aspects of the communities in which those plants live.},
keywords = {ARC, distichlis, eutrophication, fertilization, GCE, juncus, KNZ, nitrogen, plant, Salicornia, spartina},
author = {Pennings, Steven C. and Clark, Christopher M. and Cleland, Elsa E and Collins, Scott L. and Gough, Laura and Gross, Katherine L. and Milchunas, Daniel G. and Suding, Katherine N.}
}
@article {81527,
title = {Functional- and abundance-based mechanisms explain diversity loss due to N fertilization},
volume = {102},
year = {2005},
pages = {4387-4392},
abstract = {Human activities have increased N availability dramatically in terrestrial and aquatic ecosystems. Extensive research demonstrates that local plant species diversity generally declines in response to nutrient enrichment, yet the mechanisms for this decline remain unclear. Based on an analysis of >900 species responses from 34 N-fertilization experiments across nine terrestrial ecosystems in North America, we show that both trait-neutral and trait-based mechanisms operate simultaneously to influence diversity loss as production increases. Rare species were often lost because of soil fertilization, randomly with respect to traits. The risk of species loss due to fertilization ranged from >60\% for the rarest species to 10\% for the most abundant species. Perennials, species with N-fixing symbionts, and those of native origin also experienced increased risk of local extinction after fertilization, regardless of their initial abundance. Whereas abundance was consistently important across all systems, functional mechanisms were often system-dependent. As N availability continues to increase globally, management that focuses on locally susceptible functional groups and generally susceptible rare species will be essential to maintain biodiversity.},
keywords = {diversity, fertilization, GCE, nitrogen, SEV, SGS},
url = {http://www.pnas.org/cgi/content/abstract/0408648102v1},
author = {Suding, Katherine N. and Collins, Scott L. and Gough, Laura and Clark, Christopher M. and Cleland, Elsa E and Gross, Katherine L. and Milchunas, Daniel G. and Pennings, Steven C.}
}
@article {81526,
title = {Functional- and abundance-based mechanisms explain diversity loss due to N fertilization},
volume = {102},
year = {2005},
pages = {4387-4392},
publisher = {na},
keywords = {SEV, SGS},
author = {Suding, Katharine N. and Collins, Scott L. and Gough, Laura and Clark, Christopher M. and Cleland, Elsa E and Gross, Katherine L. and Milchunas, Daniel G. and Pennings, Steven C.}
}
@article {81579,
title = {Invasion in space and time: non-native species richness and relative abundance respond to interannual variation in productivity and diversity},
volume = {7},
year = {2004},
pages = {947-957},
abstract = {Ecologists have long sought to understand the relationships among species diversity, community productivity and invasion by non-native species. Here, four long-term observational datasets were analyzed using repeated measures statistics to determine how plant species richness and community resource capture (i.e., productivity) influenced invasion. Multiple factors influenced the results, including the metric used to quantify invasion, interannual variation and spatial scale. Native richness was positively correlated with non-native richness, but was usually negatively correlated with non-native abundance, and these patterns were stronger at the larger spatial scale. Logistic regressions indicted that the probability of invasion was reduced both within and following years with high productivity, except at the desert grassland site where high productivity was associated with increased invasion. Our analysis suggests that while non-natives were most likely to establish in species rich communities, their success was diminished by high resource capture by the resident community.},
keywords = {JRN, statistical methods, synthesis},
author = {Cleland, Elsa E and Vandermast, David B. and Smith, Melinda D. and Andelman, Sandy J. and Bowles, Christy and Carney, Karen M. and Horner-Devine, M. Claire and Drake, John M. and Emery, Sarah M. and Gramling, Joel M.}
}